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Australian Defense ship Ocean Shield lies docked at naval base HMAS Stirling while being fitted with a towed pinger locator to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. The Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone — an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia.(AP Photo/Rob Griffith)

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Australian defense ship Ocean Shield lies docked at naval base HMAS Stirling while being fitted with a towed pinger locator to aid in her roll in the search for missing Malaysia Airlines Flight MH370 in Perth, Australia, Sunday, March 30, 2014. The Australian warship with an aircraft black box detector was set to depart Sunday to join the search. It will still take three to four days for the ship, the Ocean Shield, to reach the search zone — an area roughly the size of Poland about 1,850 kilometers (1,150 miles) to the west of Australia. (AP Photo/Rob Griffith)

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FILE - In this Dec. 17, 2011 file photo, an Egyptian protester throws a stone toward soldiers, unseen, as a building burns during clashes near Tahrir Square, in Cairo, Egypt. In an authoritative report due out Monday, March 31, 2014, a United Nations climate panel for the first time is connecting hotter global temperatures to hotter global tempers. Top scientists are saying that climate change will complicate and worsen existing global security problems, such as civil wars, strife between nations and refugees. (AP Photo/Ahmad Hammad, File)

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FILE - In this Aug. 20, 2013 file photo, Syrian refugees cross into Iraq at the Peshkhabour border point in Dahuk, 260 miles (430 kilometers) northwest of Baghdad, Iraq. In an authoritative report due out Monday, March 31, 2014, a United Nations climate panel for the first time is connecting hotter global temperatures to hotter global tempers. Top scientists are saying that climate change will complicate and worsen existing global security problems, such as civil wars, strife between nations and refugees. (AP Photo/Hadi Mizban, File)